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January 3, 2017

Biology: Gregor Mendel - intro to genetics

Trait: A characteristic that an organism can pass on to its offspring through its genes.

Gene: A segment of DNA on a chromosome that codes for a specific trait.

Alleles: The different forms of gene.

Dominant alleles: An allele whose trait always shows up in the organism when the allele is present.

Recessive alleles: An allele that is masked when a dominant allele is present.

Hybrid: An organism that has two different alleles for a trait (heterozygous organism).Gregor Mendel (1822-1884) - Austrian scientist, priest, teacher. He studied genetics with his pea plants in the monastery. And wrote a report why some peas are tall and some are short. Back in his days no one believed his theory. Now he is considered the father of modern genetics.